A32 - 3.0v6 engine jerking

[cooper1275]

hi guys,
need some help/answers here pls,
why is the engine jerking/hickup when stop on Drive mode on brake pedal ? When stop on Neutral mode, less pronounce of engine jerk/hickup,
i have cleaned the AFM and all socket connections with proper cleaner/de rust, it improves a bit but the jerk/hicup is still there, anything to do with throttle body?

badly need advice/opinion, as tis jerk/hickup is driving me crazy!

thank u guys,

 

[ongteckweng]

check ur injectors. most probably u need to change all 6 injectors to be on the safe side

 

[sansky]

how mush the injector will cost??

 

[ongteckweng]

if not mistaken, brand new one is around rm275/piece. so 6 = rm1650!!!!
its a known problem for Cefiro over 10yrs old

 

[cmng]

it not neccesary to replace it
you can take it to ultrasound cleaning as well

 

[Lawcc]

if not mistaken, brand new one is around rm275/piece. so 6 = rm1650!!!!
its a known problem for Cefiro over 10yrs old

Hi Ong,

you change injecter before?

 

[sansky]

after ong give the price . i go ask the halcut shop . the injector cost about RM 25. wah nasib baik.

 

[cooper1275]

thank u guys, sorry for the late response,
apart from the injectors, any other possibilities? will change the injectors new, as not advisable to change econd hand?

thanx,

 

[weikee]

coil plug may also be the problem.

FYI, you need to make sure the chop shop injector are similar cc rating else you will get lean burn and it will burn your engine.

 

[ongteckweng]

after ong give the price . i go ask the halcut shop . the injector cost about RM 25. wah nasib baik.

the prob with halfcut items r they might not last long n if u r driving a 3.0, the injectors r different from 2.0 or even 2.5

unless u r sure its from 3.0, else u will face probs like what weikee stated

 

[cooper1275]

hi guys,
thanx once again,

 

[Cheong Mou Kei 4G9XT]

so has da jerking problem settle..?

 

[cooper1275]

hi,
the jerking is minimised, after changing to a second hand AFM of a later model,
but the engine pinking/knocking still persist! Mostly during the day when its hot, no pinking when raining or night driving. This is mostly temp. related, but .........No ideas - solution from anyone?

thanx,

 

[Cheong Mou Kei 4G9XT]

sound like knocking due to ignition timing is a bit advance
for a32 need handheld to tune it...i hate it
evelitime need to tune have to go back to tan chong

 

[sb3]

the prob with halfcut items r they might not last long n if u r driving a 3.0, the injectors r different from 2.0 or even 2.5

unless u r sure its from 3.0, else u will face probs like what weikee stated

Yes, i agree with Ong , Chopshop parts depends on your luck, sometimes is can last for long time other time terrible!You know wat , I have similar problem last time , went to tc shah alam , unable to fix , outside mechanic also fail to fix , Items checked and replaced 6 coilpacks (RM200-00 each), Knock sensor (RM687-00!), TPS sensor, Engine tuning (RM105-00) , Intake manifold & valve cleaning (RM150-00), Rubber hose(Joint between T/B and air filter maf sensor ),Intake manfifold gasket (upper half) , oil sealed (seated between injector and intake manifold), Cleaned tb (became worst). Even did some resistant and voltage test on the electrics, wiring and connectors, no luck . Well, only 1 thing i didn't test/replace that was the injectors.

 

[ming_fei]

Sb3,
So finally how u solve the engine jerking problem? change the injectors (new or used and how much per no?)
or can it be clean?

 

[sb3]

Sb3,
So finally how u solve the engine jerking problem? change the injectors (new or used and how much per no?)
or can it be clean?

ming_fei,nope never had a chance to touch the injectors coz i did the engine swap. But I strongly believed 2 of my injectors were stuck open. The spark plugs were (for the 2 injectors) always fouled and wet with fuel.I have swap the ignition coil and plugs a couple of times but came out with the same results (foul and wet). Power and signal were present when checked and the injectors were clicking like normal.The conectors were grounded properly.. Wat else could it be then?

 

[dream.tent]

Was thinking....Maybe the AFM sending wrong info to ECU and cause the Engine to run too rich?

 

[Cheong Mou Kei 4G9XT]

o worst case scenario....da 1 wt da foul plug might hv problem wt valve

 

[sb3]

Was thinking....Maybe the AFM sending wrong info to ECU and cause the Engine to run too rich?

Dream tent, but each time i checked it was always the same cyclinder(s) which are fouling the plugs. If AFM problem, which contributes to engine running too rich it will foul all of the plugs right?